Measuring Line Segment | Comparing Line Segments

Right here we’ll talk about about measuring line section i.e. how to attract and measure a line section utilizing scale or ruler.

We are able to measure a line section in two methods.

(i) Solely with assistance from a scale or ruler.

(ii) With the assistance of a double divider and a scale or ruler.

Measuring a line section with the assistance of a scale:

Usually, we measure a line section with the assistance of a scale marked in centimeters (cm) and inches (inches). We frequently measure line segments in centimeters. Every centimeter is split into 10 small equal components known as millimeters (mm).

1 cm. = 10mm. and 1 mm. = (frac{1}{10}) cm.

A line section has a starting and an finish. A line section is part of a line. It has two endpoints, designated A and B.

Let’s discover ways to measure a straight section. We use a scale to measure line segments. Centimeters and inches are marked alongside the 2 sides of the dimensions.

Let’s be taught to measure the size of line section AB in centimeters.

To measure the size of line section AB, we place it in order that the top level of the road section A coincides with the 0 mark of the dimensions.

We maintain the dimensions neatly alongside the road section. We learn the signal on the dimensions comparable to the B endpoint. Right here we see that the seventh centimeter mark on the dimensions comparable to the B endpoint coincides with the B endpoint. Right here we see that the 7 cm mark coincides with the B finish level. Thus, the size of the road section AB is 7 cm.

We’ve to take some precautions when measuring the road section. Generally, the 0 mark of the dimensions doesn’t seem as a result of damaged nook. If that’s the case, we are able to place another level centimeter mark of the dimensions on the finish level A and measure the road section AB by counting from that centimeter mark.

Step I: Place the sting of the dimensions on the AB line with the ‘0’ mark at level ‘A’.

Step II: Learn the dimensions at level ‘B’. Right here the mark on the dimensions is 8 cm.

AB is a line section. Accordingly, the size of the road section AB is 7 cm.

Measuring a line section with the assistance of a divider and scale:

We are able to use a divider together with a scale to measure a line section.

We rigorously unroll the splitter pair and place the spikes of the splitter pair at each ends of the road section as proven right here. We carry the divider very rigorously, with out disturbing its arms.

Now we put one finish on the zero level of the dimensions and drop the opposite finish at a selected mark of the dimensions as proven right here.

Lastly, we learn the size.

A divider has two pointed arms. The gap between the top factors might be elevated or decreased.

Place the separator on the road section RS with the sharp finish on ‘R’ and the opposite sharp finish on ‘S’.

Take away the divider and place it on the steadiness and measure the space.

Evaluating Line Segments

Line segments might be in contrast utilizing the ruler and divider.

(i) Utilizing Ruler:

Measure the road segments and discover which is longer or shorter.

(ii) Utilizing a Divider:

Evaluate the road segments AB and PQ.

Place the endpoints of the divider on the endpoints A and B of AB as proven in determine 2. (A)

Carry the separator with out disturbing its arms. Place the endpoint of 1 arm at P and see the place the endpoint of the opposite arm falls. (as proven in determine (b)

Let it drop to R.

(overline{AB}) is shorter than PQ if ‘Q’ is in entrance of R

(overline{AB}) is longer than PQ if ‘R’ is in entrance of Q

If ‘Q’ and R overlap (overline{AB}) and PQ are the identical size.

Questions and Solutions for Measuring Line Section:

1. Measure the next line segments.

(I)		= _____ centimeters
(ii)		= _____ centimeters
(iii)		= _____ centimeters
(iv)		= _____ centimeters

2. Measure all line segments within the figures beneath.

(I)

Energy High quality = _____ cm QR = _____ cm RS = _____ cm SP = _____ cm PR = _____ cm QS = _____ cm

(ii)

Energy High quality = _____ cm QR = _____ cm RS = _____ cm SP = _____ cm PR = _____ cm QS = _____ cm

4th Grade Math Actions

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